Show the performers ++

Bunch of small fixes, plus the ability to show the performers of a
given show based on the acts we've accepted so far.  Not done yet - the
act acceptance needs fixing.

Other fixes:
- better mailing of act bid and conference bid notification
- Status no longer says gaming things
- refactor of who's who display - now there are who's who for
conference, staff and performers - changed navbar and refactored code.
- some cleanup of intercon db to reduce the warnings.
- fix for a bid display utility based on previous schema change - bug
fixed